py3port: use encode() and decode() where applicable

scripts/compute-file-chksum.py

@@ -19,7 +19,7 @@ cmd_args = opts.init(opts_data)
 
 lines = get_lines_from_file(cmd_args[0])
 start = (1,0)[bool(opt.include_first_line)]
-a = make_chksum_6(' '.join(lines[start:]).encode('utf8'))
+a = make_chksum_6(' '.join(lines[start:]).encode())
 if start == 1:
 	b = lines[0]
 	msg(("Checksum in file ({}) doesn't match computed value!".format(b),'Checksum in file OK')[a==b])

scripts/create-token.py

@@ -174,8 +174,8 @@ def compile_code(code):
 	cmd = ['solc','--optimize','--bin','--overwrite']
 	if not opt.stdout: cmd += ['--output-dir', opt.outdir or '.']
 	p = Popen(cmd,stdin=PIPE,stdout=PIPE,stderr=PIPE)
-	res = p.communicate(code)
-	o = res[0].replace('\r','').split('\n')
+	res = p.communicate(code.encode())
+	o = res[0].decode().replace('\r','').split('\n')
 	dmsg(res[1])
 	if opt.stdout:
 		return dict((k,o[i+2]) for k in ('SafeMath','Owned','Token') for i in range(len(o)) if k in o[i])